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11:25
Isolation and Culture of Mouse Cortical Astrocytes
Published on: January 19, 2013
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Astrocytic modulation of cortical oscillations
Alba Bellot-Saez1,2, Greg Cohen1, André van Schaik1
1Biomedical Engineering and Neuroscience group, The MARCS Institute, Western Sydney University, Penrith, NSW, Australia.
Scientific Reports
|August 3, 2018
Summary
Astrocytes regulate brain wave frequencies by clearing extracellular potassium (K+). Impaired K+ clearance enhances network excitability, leading to high-power neural oscillations, suggesting a mechanism for tuning brain rhythms.
Area of Science:
- Neuroscience
- Cellular Biology
- Electrophysiology
Background:
- Brain waves, or neural oscillations, are rhythmic electrical activity in the brain.
- These oscillations vary in frequency and are linked to different brain functions.
- The mechanisms controlling transitions between oscillation frequencies are not fully understood.
Purpose of the Study:
- To investigate the role of astrocytic potassium (K+) clearance in modulating neural oscillations.
- To explore how astrocytic function impacts network and cellular oscillatory behavior.
Main Methods:
- Electrophysiological recordings were used to monitor neural activity.
- Astrocytic K+ clearance was manipulated by blocking K+ uptake and disrupting astrocytic connectivity.
Main Results:
- Impaired astrocytic K+ clearance increased network excitability.
- Disrupted K+ clearance led to high-power neural oscillations across a broad frequency range.
- Local increases in extracellular K+ modulated individual neuron oscillatory behavior.
Conclusions:
- Astrocytic K+ clearance is crucial for regulating neural oscillation frequencies.
- Modulating astrocytic K+ handling offers a potential strategy to optimize neural resonance and tune brain rhythms.
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